The design of high precision double buffer MEMS acceleration seismometer

In this paper, a new type of high precision double buffered MEMS acceleration seismometer is introduced. The MEMS sensor technology, £ — delta 24 bits A/D conversion technology are adopted in our method. Furthermore, FPGA extended SDRAM is utilized for the implementation. Experiments show that the detector performance compared with France's DSU3 Sercel co, frequency response reaches 0–784Hz; Power consumption is 160 mV, which can realize the large volume of 128 Mbit cache. The dynamic range and band width has been greatly improved than traditional receiver, and the ability to resist electromagnetic interference is enhanced.